1;;; gnus-fun.el --- various frivolous extension functions to Gnus 2 3;; Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. 4 5;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org> 6;; Keywords: news 7 8;; This file is part of GNU Emacs. 9 10;; GNU Emacs is free software; you can redistribute it and/or modify 11;; it under the terms of the GNU General Public License as published by 12;; the Free Software Foundation; either version 2, or (at your option) 13;; any later version. 14 15;; GNU Emacs is distributed in the hope that it will be useful, 16;; but WITHOUT ANY WARRANTY; without even the implied warranty of 17;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18;; GNU General Public License for more details. 19 20;; You should have received a copy of the GNU General Public License 21;; along with GNU Emacs; see the file COPYING. If not, write to the 22;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 23;; Boston, MA 02110-1301, USA. 24 25;;; Commentary: 26 27;;; Code: 28 29(eval-when-compile 30 (require 'cl)) 31 32(require 'mm-util) 33(require 'gnus-ems) 34(require 'gnus-util) 35(require 'gnus) 36 37(defcustom gnus-x-face-directory (expand-file-name "x-faces" gnus-directory) 38 "*Directory where X-Face PBM files are stored." 39 :version "22.1" 40 :group 'gnus-fun 41 :type 'directory) 42 43(defcustom gnus-convert-pbm-to-x-face-command "pbmtoxbm %s | compface" 44 "Command for converting a PBM to an X-Face." 45 :version "22.1" 46 :group 'gnus-fun 47 :type 'string) 48 49(defcustom gnus-convert-image-to-x-face-command "giftopnm %s | ppmnorm | pnmscale -width 48 -height 48 | ppmtopgm | pgmtopbm | pbmtoxbm | compface" 50 "Command for converting an image to an X-Face. 51By default it takes a GIF filename and output the X-Face header data 52on stdout." 53 :version "22.1" 54 :group 'gnus-fun 55 :type 'string) 56 57(defcustom gnus-convert-image-to-face-command "djpeg %s | ppmnorm | pnmscale -width 48 -height 48 | ppmquant %d | pnmtopng" 58 "Command for converting an image to a Face. 59By default it takes a JPEG filename and output the Face header data 60on stdout." 61 :version "22.1" 62 :group 'gnus-fun 63 :type 'string) 64 65(defun gnus-shell-command-to-string (command) 66 "Like `shell-command-to-string' except not mingling ERROR." 67 (with-output-to-string 68 (call-process shell-file-name nil (list standard-output nil) 69 nil shell-command-switch command))) 70 71(defun gnus-shell-command-on-region (start end command) 72 "A simplified `shell-command-on-region'. 73Output to the current buffer, replace text, and don't mingle error." 74 (call-process-region start end shell-file-name t 75 (list (current-buffer) nil) 76 nil shell-command-switch command)) 77 78;;;###autoload 79(defun gnus-random-x-face () 80 "Return X-Face header data chosen randomly from `gnus-x-face-directory'." 81 (interactive) 82 (when (file-exists-p gnus-x-face-directory) 83 (let* ((files (directory-files gnus-x-face-directory t "\\.pbm$")) 84 (file (nth (random (length files)) files))) 85 (when file 86 (gnus-shell-command-to-string 87 (format gnus-convert-pbm-to-x-face-command 88 (shell-quote-argument file))))))) 89 90;;;###autoload 91(defun gnus-insert-random-x-face-header () 92 "Insert a random X-Face header from `gnus-x-face-directory'." 93 (interactive) 94 (let ((data (gnus-random-x-face))) 95 (save-excursion 96 (message-goto-eoh) 97 (if data 98 (insert "X-Face: " data) 99 (message 100 "No face returned by `gnus-random-x-face'. Does %s/*.pbm exist?" 101 gnus-x-face-directory))))) 102 103;;;###autoload 104(defun gnus-x-face-from-file (file) 105 "Insert an X-Face header based on an image file." 106 (interactive "fImage file name (by default GIF): ") 107 (when (file-exists-p file) 108 (gnus-shell-command-to-string 109 (format gnus-convert-image-to-x-face-command 110 (shell-quote-argument (expand-file-name file)))))) 111 112;;;###autoload 113(defun gnus-face-from-file (file) 114 "Return a Face header based on an image file." 115 (interactive "fImage file name (by default JPEG): ") 116 (when (file-exists-p file) 117 (let ((done nil) 118 (attempt "") 119 (quant 16)) 120 (while (and (not done) 121 (> quant 1)) 122 (setq attempt 123 (let ((coding-system-for-read 'binary)) 124 (gnus-shell-command-to-string 125 (format gnus-convert-image-to-face-command 126 (shell-quote-argument (expand-file-name file)) 127 quant)))) 128 (if (> (length attempt) 726) 129 (progn 130 (setq quant (- quant 2)) 131 (gnus-message 9 "Length %d; trying quant %d" 132 (length attempt) quant)) 133 (setq done t))) 134 (if done 135 (mm-with-unibyte-buffer 136 (insert attempt) 137 (gnus-face-encode)) 138 nil)))) 139 140(defun gnus-face-encode () 141 (let ((step 72)) 142 (base64-encode-region (point-min) (point-max)) 143 (goto-char (point-min)) 144 (while (search-forward "\n" nil t) 145 (replace-match "")) 146 (goto-char (point-min)) 147 (while (> (- (point-max) (point)) 148 step) 149 (forward-char step) 150 (insert "\n ") 151 (setq step 76)) 152 (buffer-string))) 153 154;;;###autoload 155(defun gnus-convert-face-to-png (face) 156 "Convert FACE (which is base64-encoded) to a PNG. 157The PNG is returned as a string." 158 (mm-with-unibyte-buffer 159 (insert face) 160 (ignore-errors 161 (base64-decode-region (point-min) (point-max))) 162 (buffer-string))) 163 164;;;###autoload 165(defun gnus-convert-png-to-face (file) 166 "Convert FILE to a Face. 167FILE should be a PNG file that's 48x48 and smaller than or equal to 168726 bytes." 169 (mm-with-unibyte-buffer 170 (insert-file-contents file) 171 (when (> (buffer-size) 726) 172 (error "The file is %d bytes long, which is too long" 173 (buffer-size))) 174 (gnus-face-encode))) 175 176(defface gnus-x-face '((t (:foreground "black" :background "white"))) 177 "Face to show X-Face. 178The colors from this face are used as the foreground and background 179colors of the displayed X-Faces." 180 :group 'gnus-article-headers) 181 182(defun gnus-display-x-face-in-from (data) 183 "Display the X-Face DATA in the From header." 184 (let ((default-enable-multibyte-characters nil) 185 pbm) 186 (when (or (gnus-image-type-available-p 'xface) 187 (and (gnus-image-type-available-p 'pbm) 188 (setq pbm (uncompface data)))) 189 (save-excursion 190 (save-restriction 191 (article-narrow-to-head) 192 (gnus-article-goto-header "from") 193 (when (bobp) 194 (insert "From: [no `from' set]\n") 195 (forward-char -17)) 196 (gnus-add-image 197 'xface 198 (gnus-put-image 199 (if (gnus-image-type-available-p 'xface) 200 (gnus-create-image 201 (concat "X-Face: " data) 202 'xface t :face 'gnus-x-face) 203 (gnus-create-image 204 pbm 'pbm t :face 'gnus-x-face)) nil 'xface)) 205 (gnus-add-wash-type 'xface)))))) 206 207(defun gnus-grab-cam-x-face () 208 "Grab a picture off the camera and make it into an X-Face." 209 (interactive) 210 (shell-command "xawtv-remote snap ppm") 211 (let ((file nil)) 212 (while (null (setq file (directory-files "/tftpboot/sparky/tmp" 213 t "snap.*ppm"))) 214 (sleep-for 1)) 215 (setq file (car file)) 216 (with-temp-buffer 217 (shell-command 218 (format "pnmcut -left 110 -top 30 -width 144 -height 144 '%s' | ppmnorm 2>/dev/null | pnmscale -width 48 | ppmtopgm | pgmtopbm -threshold -value 0.92 | pbmtoxbm | compface" 219 file) 220 (current-buffer)) 221 ;;(sleep-for 3) 222 (delete-file file) 223 (buffer-string)))) 224 225(defun gnus-grab-cam-face () 226 "Grab a picture off the camera and make it into an X-Face." 227 (interactive) 228 (shell-command "xawtv-remote snap ppm") 229 (let ((file nil) 230 result) 231 (while (null (setq file (directory-files "/tftpboot/sparky/tmp" 232 t "snap.*ppm"))) 233 (sleep-for 1)) 234 (setq file (car file)) 235 (shell-command 236 (format "pnmcut -left 110 -top 30 -width 144 -height 144 '%s' | pnmscale -width 48 -height 48 | ppmtopgm > /tmp/gnus.face.ppm" 237 file)) 238 (let ((gnus-convert-image-to-face-command 239 (format "cat '%%s' | ppmquant %%d | ppmchange %s | pnmtopng" 240 (gnus-fun-ppm-change-string)))) 241 (setq result (gnus-face-from-file "/tmp/gnus.face.ppm"))) 242 (delete-file file) 243 ;;(delete-file "/tmp/gnus.face.ppm") 244 result)) 245 246(defun gnus-fun-ppm-change-string () 247 (let* ((possibilites '("%02x0000" "00%02x00" "0000%02x" 248 "%02x%02x00" "00%02x%02x" "%02x00%02x")) 249 (format (concat "'#%02x%02x%02x' '#" 250 (nth (random 6) possibilites) 251 "'")) 252 (values nil)) 253 (dotimes (i 255) 254 (push (format format i i i i i i) 255 values)) 256 (mapconcat 'identity values " "))) 257 258(provide 'gnus-fun) 259 260;;; arch-tag: 9d000a69-15cc-4491-9dc0-4627484f50c1 261;;; gnus-fun.el ends here 262